2024-03-29T10:08:04Z
https://kpbc.umk.pl/oai-pmh-repository.xml
oai:kpbc.umk.pl:76915
2016-01-29T10:36:26Z
KujawskoPomorskaDigitalLibrary:EducationalMaterials KujawskoPomorskaDigitalLibrary:EducationalMaterials:Astronomy KujawskoPomorskaDigitalLibrary